Description
When Docker fails to download the files needed to build an image, it doesn't stop and show the download error. Instead, it keeps going and tries to contact the Docker daemon
Reproduce
- Run docker build with a remote URL that returns a 404 error
docker build https://httpbin.org/status/404
- Notice that Docker does not stop after the download fails.
- Docker continues and tries to contact the Docker daemon instead of returning the download error.
Expected behavior
Docker should stop when the remote download fails and show the download error instead of sending the build context to the Docker daemon.
docker version
Client:
Version: unknown-version
API version: 1.56
Go version: go1.27.1-X:nodwarf5
Git commit: unknown-commit
Built: unknown-buildtime
OS/Arch: linux/amd64
Context: default
Server:
Engine:
Version: 29.8.1
API version: 1.56 (minimum version 1.40)
Go version: go1.27.1-X:nodwarf5
Git commit: 464cd50c3d
Built: Fri Sep 18 16:01:02 2026
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: v2.4.0
GitCommit: a7fe631d96c08fb14cf8eff0afdc280e99c30a94.m
runc:
Version: 1.5.1
GitCommit: 1.5.1-1-0-gce23c4c-dirty
docker-init:
Version: 0.19.0
GitCommit: de40ad0
docker info
Client:
Version: unknown-version
Context: default
Debug Mode: false
Plugins:
compose: Docker Compose (Docker Inc.)
Version: 5.5.1
Path: /usr/lib/docker/cli-plugins/docker-compose
Server:
Containers: 0
Running: 0
Paused: 0
Stopped: 0
Images: 52
Server Version: 29.8.1
Storage Driver: overlayfs
driver-type: io.containerd.snapshotter.v1
Logging Driver: json-file
Cgroup Driver: systemd
Cgroup Version: 2
Plugins:
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local splunk syslog
CDI spec directories:
/etc/cdi
/var/run/cdi
Swarm: inactive
Runtimes: io.containerd.runc.v2 runc
Default Runtime: runc
Init Binary: docker-init
containerd version: a7fe631d96c08fb14cf8eff0afdc280e99c30a94.m
runc version: 1.5.1-1-0-gce23c4c-dirty
init version: de40ad0
Security Options:
seccomp
Profile: builtin
cgroupns
Kernel Version: 7.2.7-1-cachyos
Operating System: CachyOS
OSType: linux
Architecture: x86_64
CPUs: 4
Total Memory: 15.53GiB
Name: Tian
ID: f9b383da-c02c-45f1-a7a8-0086e71c43e9
Docker Root Dir: /var/lib/docker
Debug Mode: false
Experimental: false
Insecure Registries:
::1/128
127.0.0.0/8
Live Restore Enabled: false
Firewall Backend: iptables
EnableUserlandProxy: true
UserlandProxyPath: /usr/bin/docker-proxyAdditional Info
Docker reports Cannot locate specified Dockerfile: Dockerfile instead of showing the error from downloading the remote files.
Description
When Docker fails to download the files needed to build an image, it doesn't stop and show the download error. Instead, it keeps going and tries to contact the Docker daemon
Reproduce
Expected behavior
Docker should stop when the remote download fails and show the download error instead of sending the build context to the Docker daemon.
docker version
Client: Version: unknown-version API version: 1.56 Go version: go1.27.1-X:nodwarf5 Git commit: unknown-commit Built: unknown-buildtime OS/Arch: linux/amd64 Context: default Server: Engine: Version: 29.8.1 API version: 1.56 (minimum version 1.40) Go version: go1.27.1-X:nodwarf5 Git commit: 464cd50c3d Built: Fri Sep 18 16:01:02 2026 OS/Arch: linux/amd64 Experimental: false containerd: Version: v2.4.0 GitCommit: a7fe631d96c08fb14cf8eff0afdc280e99c30a94.m runc: Version: 1.5.1 GitCommit: 1.5.1-1-0-gce23c4c-dirty docker-init: Version: 0.19.0 GitCommit: de40ad0docker info
Additional Info
Docker reports Cannot locate specified Dockerfile: Dockerfile instead of showing the error from downloading the remote files.